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CEH Foundation
Ethical hacking
Question | Answer |
---|---|
What is an OS? | Operating System |
There are two categories of software. Name them. | System software and Application software |
What Is a Kernel ? | The kernel is the core of the operating system. |
Ring architecture of the operating system. | |
What Is a File System ? | A file system is how data will be stored or retrieved from the storage devices in the OS. |
What are the three main groups of file systems in use today? | |
What are Device Drivers ? | Device drivers are a special type of software program used for interfacing between the hardware device and the operating system. (audio/video, storage, etc.) |
When an application is executed, the operating system has to allocate a memory region to store the application’s temporary data. What are two common ways of allocating memory to an application? | The two common ways of allocating memory to an application are stack-based and heap-based memory allocation. |
How does a Stack-Based Memory Allocation work? | The stack works in a last-in/ first-out (LIFO) manner. The stack is a limited memory area that grows or shrinks as the function pushes or pops the variables.The stack memory is allocated and freed automatically. |
How does a Heap-Based Memory Allocation work? | Heap memory is allocated using functions. The heap is a memory region that is not managed automatically (unlike the stack). |